/* ═══════════════════════════════════════════════════
   ENIGMA GROUP — Design System & Component Styles
   ═══════════════════════════════════════════════════ */

/* ─── Type Scale (fluid) ─── */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 8rem);
}

/* ─── 4px Spacing ─── */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ─── Font Families ─── */
:root {
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body: 'Switzer', 'Helvetica Neue', sans-serif;
}

/* ─── Radius, Transitions, Content Widths ─── */
:root {
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ═══════════════════════════════════════════════════
   ENIGMA PALETTE — Dark-first holding company
   Deep Navy + Teal accent on dark surfaces
   ═══════════════════════════════════════════════════ */

:root,
[data-theme='dark'] {
  --color-bg: #0A0F1A;
  --color-surface: #0F1626;
  --color-surface-2: #141D30;
  --color-surface-offset: #0D1322;
  --color-surface-offset-2: #111929;
  --color-divider: #1E2A42;
  --color-border: #243350;
  --color-text: #E2E5EC;
  --color-text-muted: #8892A8;
  --color-text-faint: #4F5B74;
  --color-text-inverse: #0A0F1A;
  --color-primary: #00C2A8;
  --color-primary-hover: #00A891;
  --color-primary-active: #008E7A;
  --color-primary-highlight: #0F2D2A;
  --color-error: #E0546E;
  --color-success: #6DAA45;
  --shadow-sm: 0 1px 2px oklch(0.05 0 240 / 0.3);
  --shadow-md: 0 4px 12px oklch(0.05 0 240 / 0.4);
  --shadow-lg: 0 12px 32px oklch(0.05 0 240 / 0.5);
}

[data-theme='light'] {
  --color-bg: #F5F6FA;
  --color-surface: #FFFFFF;
  --color-surface-2: #F0F1F5;
  --color-surface-offset: #E8E9EF;
  --color-surface-offset-2: #DDDEE6;
  --color-divider: #D1D3DC;
  --color-border: #BCC0CD;
  --color-text: #0D1B2A;
  --color-text-muted: #4A5568;
  --color-text-faint: #8892A8;
  --color-text-inverse: #F5F6FA;
  --color-primary: #008E7A;
  --color-primary-hover: #007A69;
  --color-primary-active: #006658;
  --color-primary-highlight: #D5F0EC;
  --color-error: #C7344E;
  --color-success: #437A22;
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 240 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 240 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 240 / 0.12);
}

/* System preference fallback */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #F5F6FA;
    --color-surface: #FFFFFF;
    --color-surface-2: #F0F1F5;
    --color-surface-offset: #E8E9EF;
    --color-surface-offset-2: #DDDEE6;
    --color-divider: #D1D3DC;
    --color-border: #BCC0CD;
    --color-text: #0D1B2A;
    --color-text-muted: #4A5568;
    --color-text-faint: #8892A8;
    --color-text-inverse: #F5F6FA;
    --color-primary: #008E7A;
    --color-primary-hover: #007A69;
    --color-primary-active: #006658;
    --color-primary-highlight: #D5F0EC;
    --color-error: #C7344E;
    --color-success: #437A22;
    --shadow-sm: 0 1px 2px oklch(0.2 0.01 240 / 0.06);
    --shadow-md: 0 4px 12px oklch(0.2 0.01 240 / 0.08);
    --shadow-lg: 0 12px 32px oklch(0.2 0.01 240 / 0.12);
  }
}

/* ═══════════════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════════════ */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.container--narrow {
  max-width: var(--content-default);
}

/* ─── Skip Link ─── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  z-index: 100;
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-2);
}

/* ═══════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════ */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.header__logo-text {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.header__nav {
  display: none;
  list-style: none;
  gap: var(--space-8);
  align-items: center;
}
@media (min-width: 768px) {
  .header__nav { display: flex; }
}
.header__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: 0.04em;
  transition: color var(--transition-interactive);
}
.header__nav a:hover {
  color: var(--color-primary);
}
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: oklch(from var(--color-text) l c h / 0.06);
}

/* Mobile menu */
.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text-muted);
}
@media (min-width: 768px) {
  .mobile-toggle { display: none; }
}
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 49;
  background: var(--color-bg);
  padding: var(--space-20) var(--space-6);
  flex-direction: column;
  gap: var(--space-6);
}
.mobile-menu.is-open {
  display: flex;
}
.mobile-menu a {
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: 0.04em;
}
.mobile-menu a:hover {
  color: var(--color-primary);
}

/* ═══════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    oklch(from var(--color-bg) l c h / 0.6) 0%,
    oklch(from var(--color-bg) l c h / 0.3) 40%,
    oklch(from var(--color-bg) l c h / 0.8) 100%
  );
}
.hero__content {
  position: relative;
  z-index: 1;
  padding-block: var(--space-24) var(--space-20);
}
.hero__eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: 16ch;
  line-height: 1.05;
}
.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 48ch;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}
.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  text-decoration: none;
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--color-primary);
  transition: color var(--transition-interactive), border-color var(--transition-interactive), gap var(--transition-interactive);
}
.hero__cta:hover {
  color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  gap: var(--space-3);
}
.hero__cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-interactive);
}

/* ═══════════════════════════════════════════════════
   SCROLL ANIMATIONS (CSS-only)
   ═══════════════════════════════════════════════════ */

.fade-in {
  opacity: 1;
}
@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}
@keyframes reveal-fade {
  to { opacity: 1; }
}

/* ═══════════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════════ */

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}
.section--flush {
  padding-block: 0;
}

.section__eyebrow {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  max-width: 20ch;
}
.section__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.7;
}

/* ─── Portfolio Grid ─── */
.portfolio-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-10);
}
@media (min-width: 768px) {
  .portfolio-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }
}
.portfolio-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
  text-decoration: none;
  color: inherit;
}
.portfolio-card:hover {
  border-color: oklch(from var(--color-primary) l c h / 0.3);
  box-shadow: var(--shadow-md);
}
.portfolio-card__icon {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.portfolio-card__name {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.portfolio-card__type {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.portfolio-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

/* Featured / large card */
.portfolio-card--featured {
  position: relative;
  overflow: hidden;
  padding: 0;
  min-height: 340px;
}
@media (min-width: 768px) {
  .portfolio-card--featured {
    grid-column: 1 / -1;
    min-height: 400px;
  }
}
.portfolio-card--featured img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.portfolio-card--featured .portfolio-card__content {
  position: relative;
  z-index: 1;
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
}
.portfolio-card--featured .portfolio-card__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  font-weight: 400;
}

/* ─── About / Two-Column ─── */
.about-grid {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}
@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}
.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}
.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.stat__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ─── Services / Capabilities ─── */
.capabilities-list {
  margin-top: var(--space-10);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.08);
}
.capability-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.08);
  align-items: baseline;
}
@media (min-width: 768px) {
  .capability-item {
    grid-template-columns: 2fr 3fr;
    gap: var(--space-8);
  }
}
.capability-item__title {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}
.capability-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ─── Full-bleed divider image ─── */
.divider-image {
  width: 100%;
  height: 300px;
  overflow: hidden;
}
@media (min-width: 768px) {
  .divider-image { height: 400px; }
}
.divider-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

/* ─── Contact / CTA Section ─── */
.cta-section {
  text-align: left;
}
.cta-section .section__title {
  max-width: 18ch;
}
.cta-section .section__desc {
  margin-bottom: var(--space-8);
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.cta-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.cta-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* ═══════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════ */

.footer {
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.06);
  padding-block: var(--space-10);
}
.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}
.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}
.footer__links a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer__links a:hover {
  color: var(--color-primary);
}